Ilagan
| Ilagan | |
|---|---|
| City of Ilagan | |
| Ilagan Rizal Park | |
| Nicknames: 
 | |
| Motto(s): Sulong Pa! Lungsod ng Ilagan (More Progress! City of Ilagan) | |
| Anthem: City of Ilagan Hymn (formerly, Martsa ng Ilagan (Ilagan March)) | |
| Map of Isabela with Ilagan highlighted | |
| OpenStreetMap | |
| Location within the Philippines | |
| Coordinates: 17°08′56″N 121°53′22″E / 17.1489°N 121.8894°E | |
| Country | Philippines | 
| Region | Cagayan Valley | 
| Province | Isabela | 
| District | 1st district | 
| Founded | May 4, 1686 | 
| Cityhood | August 11, 2012 | 
| Barangays | 91 (see Barangays) | 
| Government | |
| • Type | Sangguniang Panlungsod | 
| • Mayor | Josemarie L. Diaz | 
| • Vice Mayor | Kiryll S. Bello | 
| • Representative | Antonio T. Albano | 
| • City Council | Members | 
| • Electorate | 105,526 voters (2025) | 
| Area | |
|  • Total | 1,166.26 km2 (450.30 sq mi) | 
| Elevation | 139 m (456 ft) | 
| Highest elevation | 1,388 m (4,554 ft) | 
| Lowest elevation | 24 m (79 ft) | 
| Population  (2020 census) | |
|  • Total | 158,218 | 
| • Density | 140/km2 (350/sq mi) | 
| • Households | 39,663 | 
| Demonym(s) | Ilagueño (m) Ilagueña (f) | 
| Economy | |
| • Income class | 1st city income class | 
| • Poverty incidence | 14.00 | 
| • Revenue | ₱ 2,857 million (2022) | 
| • Assets | ₱ 6,137 million (2022) | 
| • Expenditure | ₱ 2,158 million (2022) | 
| • Liabilities | ₱ 2,051 million (2022) | 
| Service provider | |
| • Electricity | Isabela 2 Electric Cooperative (ISELCO 2) | 
| • Water | Metro Ilagan Water | 
| Time zone | UTC+8 (PST) | 
| ZIP code | 3300 | 
| PSGC | |
| IDD : area code | +63 (0)78 | 
| Native languages | Ibanag Ilocano Tagalog | 
| Patron saint | Saint Ferdinand of Castile | 
| Website | www | 
Ilagan, officially the City of Ilagan (Ibanag: Siudad nat Ilagan; Ilocano: Siudad ti Ilagan; Filipino: Lungsod ng Ilagan), is a component city and capital of the province of Isabela, Philippines. According to the 2020 census, it has a population of 158,218 people making it the most populous city in the province and the second most-populous in Cagayan Valley after Tuguegarao. As of 2022, it also had the highest number of voters in the province, with 101,050 voters.